THE STATE OF COALBED METHANE IN OHIO-UPDATE 2004

Published and unpublished studies suggest significant coalbed methane (CBM) resources exist in the northern Appalachian Basin. Records at the Ohio Division of Geological Survey provide evidence of several small gas fields that, at various times in the past 80 years, were developed in coal beds. Currently only one coal-mine gas operation exists; gas is being produced from abandoned deep mines in a small area of Harrison County. Eastern Ohio contains as much as 2000 feet of coal-bearing rocks that may include over 50 individual coal beds. However, these coal beds are not evenly distributed throughout the coal-bearing interval, nor are all of significant thickness to warrant economic consideration as sources for coalbed methane. Moreover, Ohio has over 4,500 abandoned underground coal mines, a significant number of which may contain unutilized coal-mine natural gas resources.

Recent coal assessment studies and a geologic CO₂ sequestration investigation by the Division indicate there may be a significant potential for future coalbed methane production in the state. Digital stratigraphic databases form the framework for a GIS analysis of methane production and CO₂ sequestration potential of selected coal beds in the Ohio portion of the northern Appalachian Basin. Using ArcGIS software, statewide maps of selected coal beds have been produced and queried to determine and illustrate areas that may be conducive for coalbed methane recovery and CO₂ sequestration in Ohio.